Abstract
We have previously reported a series of 2,4,6-trisubstituted pyrimidines as potent A2A receptor antagonists. The leading compounds often feature a potentially labile acetamide functional group which tends to hydrolyze under acidic conditions. Here we report the replacement of the acetamide functional group with bioisosteres. This effort led us to a new series of adenosine A2A receptor antagonists with improved potency and chemical stability.
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